Untitled

<!DOCTYPE html>
<html>
 <head>
  <meta charset="utf-8">
  <title>Register</title>
 </head>
 <body>
<form method="post" action="index.php">
 <center>
<p><strong >USERNAME:</strong></p>
<input type = "username" name = "username">
<p><strong>PASSWORD:</strong></p>
<input type ="password" name="password">
<p><strong>REPLAY PASSWORD:</strong></p>
<input type ="password" name="retrypassword">
<p>
<button type ="submit" name="fuck_register=">Register</button>
</p>
</center>
</form>
 </body>
</html>

<?php

	if(isset($_POST[‘fuck_register’]))
{
	if (empty($_POST['username']) && empty($_POST['password']) && empty($_POST['retrypassword']))
	{
echo "<html>";
echo "<body>";
echo "<p><strong>ОШИБКА!</strong></p>";
echo "</body>";
echo "</html>";
	}

}
?>